diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-bsp/u-boot/files/0027-CPLD-u-boot-commands-support-for-PFR.patch')
-rw-r--r-- | meta-openbmc-mods/meta-common/recipes-bsp/u-boot/files/0027-CPLD-u-boot-commands-support-for-PFR.patch | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-bsp/u-boot/files/0027-CPLD-u-boot-commands-support-for-PFR.patch b/meta-openbmc-mods/meta-common/recipes-bsp/u-boot/files/0027-CPLD-u-boot-commands-support-for-PFR.patch new file mode 100644 index 000000000..d8e7c4645 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-bsp/u-boot/files/0027-CPLD-u-boot-commands-support-for-PFR.patch @@ -0,0 +1,300 @@ +From 35a50c959b290ba8a6f0e70a42ae952b65df8a9d Mon Sep 17 00:00:00 2001 +From: AppaRao Puli <apparao.puli@linux.intel.com> +Date: Tue, 7 May 2019 11:26:35 +0530 +Subject: [PATCH] CPLD u-boot commands support for PFR + +Implemented the cpld command in u-boot for +communicating with PFR CPLD. + +Tested: +Simulated test on different I2C bus and slave +as we don't have hardware available yet. +ast# cpld dump +*** Dumping CPLD Registers *** +0x0000 | 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f +---------------------------------------------------------- +0x0000 | 03 00 00 00 01 09 00 f5 01 09 19 cb 46 4c 45 -- +0x0001 | -- 52 4f 4e 49 43 53 cf 53 2d 31 31 30 30 41 44 +0x0002 | 55 -- 30 2d 32 30 31 ca 47 38 34 30 32 -- 2d -- +0x0003 | 30 37 c2 30 31 cc 45 58 57 44 36 34 39 30 30 38 +............................. +ast# cpld read 0x00 +CPLD read successful. Reg:0x00 Val:0x03 +ast# cpld write 0x00 0x04 +CPLD write successful. Reg:0x00 Val:0x04 +ast# cpld read 0x00 +CPLD read successful. Reg:0x00 Val:0x04 +ast# + +Signed-off-by: AppaRao Puli <apparao.puli@linux.intel.com> +--- + cmd/Makefile | 1 + + cmd/cpld.c | 244 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 245 insertions(+) + create mode 100644 cmd/cpld.c + +diff --git a/cmd/Makefile b/cmd/Makefile +index a1731be..c8ac0af 100644 +--- a/cmd/Makefile ++++ b/cmd/Makefile +@@ -66,6 +66,7 @@ obj-$(CONFIG_CMD_FUSE) += fuse.o + obj-$(CONFIG_CMD_GETTIME) += gettime.o + obj-$(CONFIG_CMD_GPIO) += gpio.o + obj-$(CONFIG_CMD_I2C) += i2c.o ++obj-$(CONFIG_CMD_I2C) += cpld.o + obj-$(CONFIG_CMD_IOTRACE) += iotrace.o + obj-$(CONFIG_CMD_HASH) += hash.o + obj-$(CONFIG_CMD_IDE) += ide.o +diff --git a/cmd/cpld.c b/cmd/cpld.c +new file mode 100644 +index 0000000..63220cb +--- /dev/null ++++ b/cmd/cpld.c +@@ -0,0 +1,244 @@ ++/* ++ * Copyright (c) 2018-2019 Intel Corporation ++ * Written by AppaRao Puli <apparao.puli@intel.com> ++ * ++ * SPDX-License-Identifier: GPL-2.0+ ++ */ ++ ++#include <common.h> ++#include <command.h> ++#include <cli.h> ++#include <i2c.h> ++#include <errno.h> ++#include <linux/compiler.h> ++ ++#define PFR_CPLD_I2C_BUSNO 5 ++#define PFR_CPLD_SLAVE_ADDR 0x0E ++ ++#define CPLD_READ_TIMEOUT_ATTEMPTS 5 ++ ++/* Some CPLD registers are self cleared after read. ++ * We should skip them reading to avoid functionality impact.*/ ++/* TODO: Need to get this list from CPLD team. */ ++static uchar cpld_reg_skip_read[] = {}; ++ ++static bool skip_cpld_reg_read(u32 reg) ++{ ++ int size = ARRAY_SIZE(cpld_reg_skip_read); ++ for (int i = 0; i < size; i++) { ++ if (reg == cpld_reg_skip_read[i]) ++ return true; ++ } ++ ++ return false; ++} ++ ++static int do_cpld_write(cmd_tbl_t *cmdtp, int flag, int argc, ++ char *const argv[]) ++{ ++ int ret = 0; ++ int current_bus_no; ++ u32 reg_addr; ++ uchar value; ++ int chip = (PFR_CPLD_SLAVE_ADDR >> 1); ++ ++ if (argc != 3) ++ return CMD_RET_USAGE; ++ ++ reg_addr = simple_strtoul(argv[1], NULL, 16); ++ if (reg_addr > 0xFF) { ++ printf("Invalid register. Valid range[0x00-0xFF]."); ++ return CMD_RET_FAILURE; ++ } ++ value = simple_strtoul(argv[2], NULL, 16); ++ ++ /* Get current I2C bus number to restore later. */ ++ current_bus_no = i2c_get_bus_num(); ++ ++ /* Set I2C bus number to PFR CPLD I2C bus. */ ++ ret = i2c_set_bus_num(PFR_CPLD_I2C_BUSNO); ++ if (ret) { ++ printf("Failure changing bus number (%d)\n", ret); ++ ret = CMD_RET_FAILURE; ++ goto done; ++ } ++ ++ ret = i2c_write(chip, reg_addr, 1, &value, 1); ++ if (ret) { ++ printf("Error writing the chip: %d\n", ret); ++ ret = CMD_RET_FAILURE; ++ goto done; ++ } ++ ++ printf("CPLD write successful. Reg:0x%02x Val:0x%02x\n", reg_addr, ++ value); ++ ++done: ++ /* Restore I2C bus number */ ++ if (i2c_set_bus_num(current_bus_no)) ++ printf("Error in restoring bus number.\n"); ++ ++ return ret; ++} ++ ++static int do_cpld_read(cmd_tbl_t *cmdtp, int flag, int argc, ++ char *const argv[]) ++{ ++ int ret = 0; ++ int current_bus_no; ++ u32 reg_addr; ++ uchar value[1]; ++ int chip = (PFR_CPLD_SLAVE_ADDR >> 1); ++ ++ if (argc != 2) ++ return CMD_RET_USAGE; ++ ++ reg_addr = simple_strtoul(argv[1], NULL, 16); ++ if (reg_addr > 0xFF) { ++ printf("Invalid register. Valid range[0x00-0xFF]."); ++ return CMD_RET_FAILURE; ++ } ++ ++ /* Get current I2C bus number to restore later. */ ++ current_bus_no = i2c_get_bus_num(); ++ ++ /* Set I2C bus number to PFR CPLD I2C bus. */ ++ ret = i2c_set_bus_num(PFR_CPLD_I2C_BUSNO); ++ if (ret) { ++ printf("Failure changing bus number (%d)\n", ret); ++ ret = CMD_RET_FAILURE; ++ goto done; ++ } ++ ++ if (skip_cpld_reg_read(reg_addr)) { ++ printf("CPLD register(0x%02x) reading is not allowed.\n", ++ reg_addr); ++ ret = 0; ++ goto done; ++ } ++ ++ ret = i2c_read(chip, reg_addr, 1, value, 1); ++ if (ret) { ++ printf("Error reading the chip: %d\n", ret); ++ ret = CMD_RET_FAILURE; ++ goto done; ++ } ++ ++ printf("CPLD read successful. Reg:0x%02x Val:0x%02x\n", reg_addr, ++ value[0]); ++ ++done: ++ /* Restore I2C bus number */ ++ if (i2c_set_bus_num(current_bus_no)) ++ printf("Error in restoring bus number.\n"); ++ ++ return ret; ++} ++ ++static int do_cpld_dump(cmd_tbl_t *cmdtp, int flag, int argc, ++ char *const argv[]) ++{ ++ int ret = 0; ++ int current_bus_no; ++ u32 reg_addr = 0x00; ++ uchar value[1]; ++ int chip = (PFR_CPLD_SLAVE_ADDR >> 1); ++ ++ if (argc != 1) ++ return CMD_RET_USAGE; ++ ++ /* Get current I2C bus number to restore later. */ ++ current_bus_no = i2c_get_bus_num(); ++ ++ /* Set I2C bus number to PFR CPLD I2C bus. */ ++ ret = i2c_set_bus_num(PFR_CPLD_I2C_BUSNO); ++ if (ret) { ++ printf("Failure changing bus number (%d)\n", ret); ++ ret = CMD_RET_FAILURE; ++ goto done; ++ } ++ ++ printf("*** Dumping CPLD Registers ***\n", reg_addr, value); ++ printf("0x%04x | ", reg_addr); ++ for (int i = 0; i < 0x10; i++) ++ printf(" %02x", i); ++ printf("\n----------------------------------------------------------\n"); ++ ++ while (reg_addr <= 0xFF) { ++ if ((reg_addr % 16) == 0) ++ printf("0x%04x | ", (reg_addr / 16)); ++ ++ if (skip_cpld_reg_read(reg_addr)) { ++ printf(" --"); ++ } else { ++ int timeout = 0; ++ while (i2c_read(chip, reg_addr, 1, value, 1) != 0) { ++ if (timeout++ >= CPLD_READ_TIMEOUT_ATTEMPTS) { ++ printf("\nERROR: Reading the chip: %d\n", ++ ret); ++ ret = CMD_RET_FAILURE; ++ goto done; ++ } ++ /* Need delay for I2C devices continous read */ ++ mdelay(3 * timeout); ++ } ++ printf(" %02x", value[0]); ++ } ++ ++ reg_addr++; ++ if ((reg_addr % 16) == 0) ++ printf("\n"); ++ } ++ ++done: ++ /* Restore I2C bus number */ ++ if (i2c_set_bus_num(current_bus_no)) ++ printf("Error in restoring bus number.\n"); ++ ++ return ret; ++} ++static cmd_tbl_t cmd_cpld_sub[] = { ++ U_BOOT_CMD_MKENT(dump, 1, 1, do_cpld_dump, "", ""), ++ U_BOOT_CMD_MKENT(read, 2, 1, do_cpld_read, "", ""), ++ U_BOOT_CMD_MKENT(write, 3, 1, do_cpld_write, "", "") ++}; ++ ++/** ++ * do_cpld() - Handle the "cpld" command-line command ++ * @cmdtp: Command data struct pointer ++ * @flag: Command flag ++ * @argc: Command-line argument count ++ * @argv: Array of command-line arguments ++ * ++ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative ++ * on error. ++ */ ++static int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) ++{ ++ cmd_tbl_t *c = NULL; ++ ++ if (argc < 2) ++ return CMD_RET_USAGE; ++ ++ /* Strip off leading 'cpld' command argument */ ++ argc--; ++ argv++; ++ ++ if (argc) ++ c = find_cmd_tbl(argv[0], cmd_cpld_sub, ++ ARRAY_SIZE(cmd_cpld_sub)); ++ ++ if (c) ++ return c->cmd(cmdtp, flag, argc, argv); ++ else ++ return CMD_RET_USAGE; ++} ++ ++#ifdef CONFIG_SYS_LONGHELP ++static char cpld_help_text[] = ++ "cpld dump - Dump all CPLD registers.\n" ++ "cpld read <reg> - Read CPLD register.\n" ++ "cpld write <reg> <val> - Write CPLD register.\n"; ++#endif ++ ++U_BOOT_CMD(cpld, 4, 1, do_cpld, "PFR CPLD information", cpld_help_text); +-- +2.7.4 + |